export default {
    uuid:function (len, radix) {
      var chars = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'.split('');
     var uuid = [], i;
     radix = radix || chars.length;
      
     if (len) {
       // Compact form
       for (i = 0; i < len; i++) uuid[i] = chars[0 | Math.random()*radix];
     } else {
       // rfc4122, version 4 form
       var r;
      
       // rfc4122 requires these characters
       uuid[8] = uuid[13] = uuid[18] = uuid[23] = '-';
       uuid[14] = '4';
      
       // Fill in random data.  At i==19 set the high bits of clock sequence as
       // per rfc4122, sec. 4.1.5
       for (i = 0; i < 36; i++) {
         if (!uuid[i]) {
           r = 0 | Math.random()*16;
           uuid[i] = chars[(i == 19) ? (r & 0x3) | 0x8 : r];
         }
       }
     }
      
     return uuid.join('');
    }
}